Attachment for paper-cutting machines



Aug. 14,1945.

J. R. BROUGHE R I ATTACHMENT FOR PAPER CUTTING MACHINES Filed Aug. 30,1944 INVENTOR.

Patented Aug. 14, 1945 MACHINES {ATTACHMENT roR PAPER-CUTTING ".Jo hnRnBrougher, Calvert, Tex.

- f Application August so, 1944, Serial No. 551,872 :f lClaim. (o1.164--94) This invention relates to an attachment for a paper cuttingmachine whereby a machine of that type can be utilized for performingvarious op-- erations for which separate machines heretofore have beennecessary. For example, it -becomeS possible to convert :a paper cuttingmachine quickly through paper, for rounding the corners of sheets,

etc. Y

A further object of the inventionis to provide an attachment which canbe quickly and securely placed in position for the purpose of convertingthe paper cutting machine to a paper punch or the like.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention consists of certain novel steps inthe method and certain details of construction and combinations of partshereinafter more fully described and pointed out in the claim, it beingunderstood that changes may be made in the method disclosed and in theconstruction and arrangement of parts without departing from the spiritof the invention as claimed.

In the accompanying drawingthe preferred form of the invention has beenshown.

In said drawing:

Figure 1 is a perspective view partly in section showing the presentimprovements combined with a portion of a paper cutting machine of theDiamond type such as manufactured by Barnhart Brothers and Spindler, andin general use in printing establishments.

Figure 2 is an enlarged view of the present improvements, partly insection and partly in elevation.

In paper cutting machines of the type mentioned there is provided, inconnection with the bed of the machine, an adjustable back gauge, a sidegauge, a clamping bar, and a cutter bar. The cutter bar cooperates witha cutter stick which is removably mounted in a groove formed in the bedof the machine. In the cutting operation the stack of paper to be cut isplaced against the side and back gauges after they have been properlyadjusted, after which the clampin bar is lowered on' to the paper. Thecutter bar is then set in motion and moves downwardly through the paperto the cutter'stick, thereby severing the paper.

Heretofore the foregoing operation is the only one which has beenperformed by a. paper cutting machine and whenever it has been desiredto punch holes in paper, to round the corners, to drill paper or performother like operations, it

into a machine for-punching holes.

has been necessaryto invest considerable money for the purpose'ofpurchasing: machines designed:

to perform these particular operations. This has been prohibitive insmall printing establishments and, consequently, the operations of suchestablishments have been limited.

As before indicated the present inventionis designed to enable the ownerof apaper cutting machine to convert it so'that it'can be usedfor otherpurposes, such as punching holes, rounding corners, etc. ment to beplaced in the cutter stick groove after the cutter stick has'ibeenremovedjso that the attachment is in position for actuation by the paperclamp ordinarily found on the machine. In the drawing a portion of thebed of the machine has been indicated at A. A back gauge is adjustablymounted on the bed and a portion thereof has been indicated at B. Thepaper clamp remains unchanged and is operated in the usual way. Aportion of the clamp, which is suspended above the cutter stick grooveC, has been indicated at D. r

In the present case the attachment includes a block I proportioned tofit snugly but movably within the groove C and having a slot 2 extendedthereinto with its bottom wall flush with the top of bed A, this slotbeing sufficiently high to receive the work to be cut or punched. Thosesides of the block nearest the walls of groove C are recessed, as at 3,to receive clamping jaws or plates 4 mounted on the respective ends ofan adjusting screw 5, the middle portion of which is rotatably mountedin a forked ear 6 extended from one wall of the block I and located ingroove Cbelow the level of slot 2. A collar 1 is secured to the screwand is located in the forked ear 6, and this collar can be provided withone or more recesses 8 adapted to receive a pin or the like used forrotating the screw. The threads at one end of the screw are pitchedoppositely to the threads of the other end of the screw and the two jawsare engaged by the respective ends .of this screw. Thus when thefscrewis rotated in one direction, the jaws will be moved apart and can beforced into clamping or frictional engagement with the opposed walls ofthe groove C, Whereas by reversing the rotation of the screw, the jawscan be drawn toward each other.

The upper portion of the block carries the element or elements to beused in punching or cut-- ting the paper. In the present case a punch 9is slidably mounted in the block and is held normally above the groove 2by coiled spring Ill. Any suitable means can be employed for limitingThe invention includes an attachthe upward movement of the punch. Forexample, and as shown, the lower portion of the punch of operation to beperformed. If a single hole is to be punched through a stack of paper,the attachment will be provided with a "single punch 10 in the slot;

as shown. If two holes or more are to be punched, two or more of theyieldingly supported elements) 9 can be used in the block. If theattachment is to be employed for rounding corners; there'cipro-" catingelement could be in the form of a curved" 15* connected could be usedfor supporting anyknife mounted for sliding movement inthe block.

Thus, the owner of a paper cutting machine can be equipped with severalattaclmients: each adapted to perform a particular operation.

gauges and with a portion in the'slot 2. The clamp D is then lowered inthe usual way and will descend upon the upper end of the punch 9,forcing it downwardly through the material. By

6 raising the clamp the punch will be lifted by its spring andtheoperation then can be repeated. By the term punch it is to be understoodthat reference is made to any kind of cutting or paper processing toolmounted. for reciprocation Furthermore, while one expansible attachmentonly has been, shown in position within the '"gr'oove C, it is to beunderstood that two or more of these exp'ansible clamping devicessuitably selected type of paper processing'element.

' What is claimed is:

-' The: combination with the bed and movable paper clamps of a papercutting machine, there When it is desired to use one of the attachmentaio bifiga cutter-stick groove in the bed beneath the jaws 4 aredrawn;towardceach-other by rotatmgg. screw 5: inone direction. Theattachment, iSi then placed inthe: groove 0 after the cutter stick-1 hasbeen, removed and-is; at that theaclampsof an attachmentiremovablyseated in the groove andl including: a block having a slotforzthereception of material tocbecut, jaws movablyimounted'at the:sidesaof.= the;block :and withtime directly beneaththe' clamp'Diordinaril-yused. 25 in the groove, means carried bysthe-block-for ad:

on a paper cutting machine; The-attachment is notfastened-inplacexuntilwafter it. has been properly; located qwith.respect to: the guides.- After it has been correctly positioned,theattachjustably connecting the jawsltolthe block, said jaws being;mounted forimovement, away from each other to.frietionallyengaggethenwalls of the groove, and a yieldingly supportedpaper cutting ment ,is secured by rotating screw 5; so; as to 30 elementcarried-by t e block and p ti ned for forcethejaws 4-outwardly againstthe walls ot the groove Thereafter the mate-rialto be perforated isplaced ,onlzthe bed against the actuation bytheaclampa.

